Why Mapper runs in heavy weight process and not in a thread in MapReduce?
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What are the advantages of using map side join in mapreduce?
how indexing in HDFS is done?
What is a RecordReader in Hadoop MapReduce?
How to submit extra files(jars,static files) for MapReduce job during runtime in Hadoop?
What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?
what is "map" and what is "reducer" in Hadoop?
Explain about the partitioning, shuffle and sort phase
What is difference between a MapReduce InputSplit and HDFS block
How to set the number of reducers?
Is YARN a replacement of Hadoop MapReduce?
How to configure the number of the Combiner in MapReduce?
What do sorting and shuffling do?
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